Learn to play the melody of this song with your right hand alone, then you can add chords with your left hand. On the second line, reach down with your thumb to play the G which is written in the bass.
Use correct fingering (the numbers between the treble and bass staves) and you will have a smooth melody.
Add a rhythm such as a ballad. Begin ver-r-ry slowly with a metronome speed of 60.
When you can play it well at that speed, then try it faster.